High-frequency heating apparatus

Application Number: 00102725
Application Date: 2000.02.18
Publication Number: 1264013
Publication Date: 2000.08.23
Priority Information: 1999/2/19 JP 041572/1999
International: F24C7/02
Applicant(s) Name: Sanyo Electric Co., Ltd.
Inventor(s) Name: Omori Yoshiji;Hayami Katsuaki
Patent Agency Code: 72002
Patent Agent: cheng wei
Abstract The microwave oven is provided with a magnetron and a wave guide. The wave guide is formed by a combining portion and a matching portion. The magnetron is provided with a magnetron antenna, and the magnetron antenna projects into the combining portion. The combining portion has one end connected to the matching portion, and has a structure in which the cross-sectional area does not change in the horizontal direction. The matching portion has a structure in which its cross-sectional area increases toward the side surface of a heating chamber. An antenna is provided on a mica board in the portion connecting a matching portion with another matching portion.